INFO: task bch-copygc/loop:5250 blocked for more than 143 seconds.
Not tainted 6.11.0-syzkaller-02520-gadfc3ded5c33 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-copygc/loop state:D stack:20272 pid:5250 tgid:5250 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
__closure_sync+0x259/0x2f0 lib/closure.c:146
bch2_wait_on_allocator fs/bcachefs/alloc_foreground.h:238 [inline]
__bch2_write+0x55a7/0x5d20 fs/bcachefs/io_write.c:1506
bch2_write+0x947/0x1670 fs/bcachefs/io_write.c:1633
closure_queue include/linux/closure.h:270 [inline]
closure_call include/linux/closure.h:432 [inline]
bch2_data_update_read_done+0x22e/0x330 fs/bcachefs/data_update.c:423
move_write fs/bcachefs/move.c:133 [inline]
bch2_moving_ctxt_do_pending_writes+0x44c/0x8d0 fs/bcachefs/move.c:164
move_buckets_wait+0x2ba/0x1290 fs/bcachefs/movinggc.c:114
bch2_copygc_thread+0x83f/0xc20 fs/bcachefs/movinggc.c:386
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e738660 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e738660 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e738660 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626
2 locks held by getty/4975:
#0: ffff88803096b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor114/6056:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-syzkaller-02520-gadfc3ded5c33 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5234 Comm: sshd Not tainted 6.11.0-syzkaller-02520-gadfc3ded5c33 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:virtqueue_add_outbuf+0x4d/0x110 drivers/virtio/virtio_ring.c:2266
Code: 4c 24 10 89 54 24 0c 49 89 f6 48 89 fb 65 48 8b 04 25 28 00 00 00 48 89 44 24 60 49 bc 00 00 00 00 00 fc ff df 4c 8d 6c 24 40 <48> c7 44 24 20 b3 8a b5 41 48 c7 44 24 28 1c 1b f0 8d 48 c7 44 24
RSP: 0018:ffffc900036e6a20 EFLAGS: 00000282
RAX: 95eba803e0b81e00 RBX: ffff8880275df400 RCX: ffff88807c3054f0
RDX: 0000000000000003 RSI: ffff888027b70460 RDI: ffff8880275df400
RBP: ffffc900036e6ad0 R08: 0000000000000820 R09: 1ffffffff1fee70d
R10: dffffc0000000000 R11: fffffbfff1fee70e R12: dffffc0000000000
R13: ffffc900036e6a60 R14: ffff888027b70460 R15: 0000000000000003
FS: 00007f557c59b800(0000) GS:ffff8880b8900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7af31ff000 CR3: 000000007a214000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
xmit_skb drivers/net/virtio_net.c:3043 [inline]
start_xmit+0xfe4/0x22e0 drivers/net/virtio_net.c:3072
__netdev_start_xmit include/linux/netdevice.h:4916 [inline]
netdev_start_xmit include/linux/netdevice.h:4925 [inline]
xmit_one net/core/dev.c:3588 [inline]
dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3604
sch_direct_xmit+0x29c/0x5d0 net/sched/sch_generic.c:343
__dev_xmit_skb net/core/dev.c:3817 [inline]
__dev_queue_xmit+0x1a74/0x3e80 net/core/dev.c:4390
dev_queue_xmit include/linux/netdevice.h:3094 [inline]
neigh_hh_output include/net/neighbour.h:526 [inline]
neigh_output include/net/neighbour.h:540 [inline]
ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:236
ip_local_out net/ipv4/ip_output.c:130 [inline]
__ip_queue_xmit+0x118c/0x1b80 net/ipv4/ip_output.c:536
__tcp_transmit_skb+0x2544/0x3b30 net/ipv4/tcp_output.c:1466
tcp_transmit_skb net/ipv4/tcp_output.c:1484 [inline]
tcp_write_xmit+0x17b5/0x6bf0 net/ipv4/tcp_output.c:2830
__tcp_push_pending_frames+0x9b/0x360 net/ipv4/tcp_output.c:3015
tcp_sendmsg_locked+0x45f9/0x50a0 net/ipv4/tcp.c:1325
tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1357
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x1a6/0x270 net/socket.c:745
sock_write_iter+0x2d7/0x3f0 net/socket.c:1166
new_sync_write fs/read_write.c:590 [inline]
vfs_write+0xa6d/0xc90 fs/read_write.c:683
ksys_write+0x1a0/0x2c0 fs/read_write.c:736
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f557c955bf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffffa970818 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000074 RCX: 00007f557c955bf2
RDX: 0000000000000074 RSI: 000055fea78d9960 RDI: 0000000000000004
RBP: 000055fea78e7220 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000055fe6bfaeaa4
R13: 00000000000001ae R14: 000055fe6bfaf3e8 R15: 00007ffffa970888
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.155 msecs